I haven't tried them on my bass yet, but I have them on my acoustic guitar. Dragon Skin is an accurate description, probably the most durable coating I've seen. No fraying like I usually get with coated strings.

"DR Dragon-Skin Bass Strings use DR's Clear Coated proprietary K3 coating which is the first coating to make no apologizes and no excuses. Players have said the DR Dragon-Skin bass strings have less [sic] unwanted overtones, more volume, and greater articulation than standard non-coated electric bass strings."

I don't understand how coating strings can increase volume and articulation (coatings typically attenuate vibration). But, if Dragon-Skin strings can reduce the annoying overtones endemic to so many round-wounds, that would be worthy of celebration.